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2020-05-19dt-bindings: thermal: Add the idle cooling deviceDaniel Lezcano
Some devices are not able to cool down by reducing their voltage / frequency because it could be not available or the system does not allow voltage scaling. In this configuration, it is not possible to use this strategy and the idle injection cooling device can be used instead. One idle cooling device is now present for the CPU as implemented by the combination of the idle injection framework belonging to the power capping framework and the thermal cooling device. The missing part is the DT binding providing a way to describe how the cooling device will work on the system. A first iteration was done by making the cooling device to point to the idle state. Unfortunately it does not make sense because it would need to duplicate the idle state description for each CPU in order to have a different phandle and make the thermal internal framework happy. It was proposed to add an cooling-cells to <3>, unfortunately the thermal framework is expecting a value of <2> as stated by the documentation and it is not possible from the cooling device generic code to loop this third value to the back end cooling device. Another proposal was to add a child 'thermal-idle' node as the SCMI does. This approach allows to have a self-contained configuration for the idle cooling device without colliding with the cpufreq cooling device which is based on the CPU node. In addition, it allows to have the cpufreq cooling device and the idle cooling device to co-exist together as shown in the example. Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Reviewed-by: Amit Kucheria <amit.kucheria@linaro.org> Link: https://lore.kernel.org/r/20200429103644.5492-2-daniel.lezcano@linaro.org
2020-04-14dt-bindings: thermal: k3: Add VTM bindings documentationKeerthy
Add VTM bindings documentation. In the Voltage Thermal Management Module(VTM), K3 AM654 supplies a voltage reference and a temperature sensor feature that are gathered in the band gap voltage and temperature sensor (VBGAPTS) module. The band gap provides current and voltage reference for its internal circuits and other analog IP blocks. The analog-to-digital converter (ADC) produces an output value that is proportional to the silicon temperature. Signed-off-by: Keerthy <j-keerthy@ti.com> Reviewed-by: Rob Herring <robh@kernel.org> Reviewed-by: Amit Kucheria <amit.kucheria@linaro.org> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Link: https://lore.kernel.org/r/20200407055116.16082-2-j-keerthy@ti.com
2020-04-12Merge tag 'timers-urgent-2020-04-12' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull time(keeping) updates from Thomas Gleixner: - Fix the time_for_children symlink in /proc/$PID/ so it properly reflects that it part of the 'time' namespace - Add the missing userns limit for the allowed number of time namespaces, which was half defined but the actual array member was not added. This went unnoticed as the array has an exessive empty member at the end but introduced a user visible regression as the output was corrupted. - Prevent further silent ucount corruption by adding a BUILD_BUG_ON() to catch half updated data. * tag 'timers-urgent-2020-04-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: ucount: Make sure ucounts in /proc/sys/user don't regress again time/namespace: Add max_time_namespaces ucount time/namespace: Fix time_for_children symlink
2020-04-11Merge tag 'nios2-v5.7-rc1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/lftan/nios2 Pull nios2 updates from Ley Foon Tan: - Remove nios2-dev@lists.rocketboards.org from MAINTAINERS - remove 'resetvalue' property - rename 'altr,gpio-bank-width' -> 'altr,ngpio' - enable the common clk subsystem on Nios2 * tag 'nios2-v5.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/lftan/nios2: MAINTAINERS: Remove nios2-dev@lists.rocketboards.org arch: nios2: remove 'resetvalue' property arch: nios2: rename 'altr,gpio-bank-width' -> 'altr,ngpio' arch: nios2: Enable the common clk subsystem on Nios2
2020-04-11Merge tag 'kbuild-v5.7-2' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild Pull more Kbuild updates from Masahiro Yamada: - raise minimum supported binutils version to 2.23 - remove old CONFIG_AS_* macros that we know binutils >= 2.23 supports - move remaining CONFIG_AS_* tests to Kconfig from Makefile - enable -Wtautological-compare warnings to catch more issues - do not support GCC plugins for GCC <= 4.7 - fix various breakages of 'make xconfig' - include the linker version used for linking the kernel into LINUX_COMPILER, which is used for the banner, and also exposed to /proc/version - link lib-y objects to vmlinux forcibly when CONFIG_MODULES=y, which allows us to remove the lib-ksyms.o workaround, and to solve the last known issue of the LLVM linker - add dummy tools in scripts/dummy-tools/ to enable all compiler tests in Kconfig, which will be useful for distro maintainers - support the single switch, LLVM=1 to use Clang and all LLVM utilities instead of GCC and Binutils. - support LLVM_IAS=1 to enable the integrated assembler, which is still experimental * tag 'kbuild-v5.7-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (36 commits) kbuild: fix comment about missing include guard detection kbuild: support LLVM=1 to switch the default tools to Clang/LLVM kbuild: replace AS=clang with LLVM_IAS=1 kbuild: add dummy toolchains to enable all cc-option etc. in Kconfig kbuild: link lib-y objects to vmlinux forcibly when CONFIG_MODULES=y MIPS: fw: arc: add __weak to prom_meminit and prom_free_prom_memory kbuild: remove -I$(srctree)/tools/include from scripts/Makefile kbuild: do not pass $(KBUILD_CFLAGS) to scripts/mkcompile_h Documentation/llvm: fix the name of llvm-size kbuild: mkcompile_h: Include $LD version in /proc/version kconfig: qconf: Fix a few alignment issues kconfig: qconf: remove some old bogus TODOs kconfig: qconf: fix support for the split view mode kconfig: qconf: fix the content of the main widget kconfig: qconf: Change title for the item window kconfig: qconf: clean deprecated warnings gcc-plugins: drop support for GCC <= 4.7 kbuild: Enable -Wtautological-compare x86: update AS_* macros to binutils >=2.23, supporting ADX and AVX2 crypto: x86 - clean up poly1305-x86_64-cryptogams.S by 'make clean' ...
2020-04-10Merge branch 'akpm' (patches from Andrew)Linus Torvalds
Merge yet more updates from Andrew Morton: - Almost all of the rest of MM (memcg, slab-generic, slab, pagealloc, gup, hugetlb, pagemap, memremap) - Various other things (hfs, ocfs2, kmod, misc, seqfile) * akpm: (34 commits) ipc/util.c: sysvipc_find_ipc() should increase position index kernel/gcov/fs.c: gcov_seq_next() should increase position index fs/seq_file.c: seq_read(): add info message about buggy .next functions drivers/dma/tegra20-apb-dma.c: fix platform_get_irq.cocci warnings change email address for Pali Rohár selftests: kmod: test disabling module autoloading selftests: kmod: fix handling test numbers above 9 docs: admin-guide: document the kernel.modprobe sysctl fs/filesystems.c: downgrade user-reachable WARN_ONCE() to pr_warn_once() kmod: make request_module() return an error when autoloading is disabled mm/memremap: set caching mode for PCI P2PDMA memory to WC mm/memory_hotplug: add pgprot_t to mhp_params powerpc/mm: thread pgprot_t through create_section_mapping() x86/mm: introduce __set_memory_prot() x86/mm: thread pgprot_t through init_memory_mapping() mm/memory_hotplug: rename mhp_restrictions to mhp_params mm/memory_hotplug: drop the flags field from struct mhp_restrictions mm/special: create generic fallbacks for pte_special() and pte_mkspecial() mm/vma: introduce VM_ACCESS_FLAGS mm/vma: define a default value for VM_DATA_DEFAULT_FLAGS ...
2020-04-10Merge tag 'docs-5.7-2' of git://git.lwn.net/linuxLinus Torvalds
Pull Documentation fixes from Jonathan Corbet: "A handful of late-arriving fixes for the documentation tree" * tag 'docs-5.7-2' of git://git.lwn.net/linux: Documentation: android: binderfs: add 'stats' mount option Documentation: driver-api/usb/writing_usb_driver.rst Updates documentation links docs: driver-api: address duplicate label warning Documentation: sysrq: fix RST formatting docs: kernel-parameters.txt: Fix broken references docs: kernel-parameters.txt: Remove nompx docs: filesystems: fix typo in qnx6.rst
2020-04-10Merge tag 'for-linus-5.7-ofs1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/hubcap/linux Pull orangefs updates from Mike Marshall: "A fix and two cleanups. Fix: - Christoph Hellwig noticed that some logic I added to orangefs_file_read_iter introduced a race condition, so he sent a reversion patch. I had to modify his patch since reverting at this point broke Orangefs. Cleanups: - Christoph Hellwig noticed that we were doing some unnecessary work in orangefs_flush, so he sent in a patch that removed the un-needed code. - Al Viro told me he had trouble building Orangefs. Orangefs should be easy to build, even for Al :-). I looked back at the test server build notes in orangefs.txt, just in case that's where the trouble really is, and found a couple of typos and made a couple of clarifications" * tag 'for-linus-5.7-ofs1' of git://git.kernel.org/pub/scm/linux/kernel/git/hubcap/linux: orangefs: clarify build steps for test server in orangefs.txt orangefs: don't mess with I_DIRTY_TIMES in orangefs_flush orangefs: get rid of knob code...
2020-04-10change email address for Pali RohárPali Rohár
For security reasons I stopped using gmail account and kernel address is now up-to-date alias to my personal address. People periodically send me emails to address which they found in source code of drivers, so this change reflects state where people can contact me. [ Added .mailmap entry as per Joe Perches - Linus ] Signed-off-by: Pali Rohár <pali@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Joe Perches <joe@perches.com> Link: http://lkml.kernel.org/r/20200307104237.8199-1-pali@kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-04-10docs: admin-guide: document the kernel.modprobe sysctlEric Biggers
Document the kernel.modprobe sysctl in the same place that all the other kernel.* sysctls are documented. Make sure to mention how to use this sysctl to completely disable module autoloading, and how this sysctl relates to CONFIG_STATIC_USERMODEHELPER. [ebiggers@google.com: v5] Link: http://lkml.kernel.org/r/20200318230515.171692-4-ebiggers@kernel.org Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Cc: Alexei Starovoitov <ast@kernel.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Jeff Vander Stoep <jeffv@google.com> Cc: Jessica Yu <jeyu@kernel.org> Cc: Kees Cook <keescook@chromium.org> Cc: Luis Chamberlain <mcgrof@kernel.org> Cc: NeilBrown <neilb@suse.com> Link: http://lkml.kernel.org/r/20200312202552.241885-4-ebiggers@kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-04-10mm: hugetlb: optionally allocate gigantic hugepages using cmaRoman Gushchin
Commit 944d9fec8d7a ("hugetlb: add support for gigantic page allocation at runtime") has added the run-time allocation of gigantic pages. However it actually works only at early stages of the system loading, when the majority of memory is free. After some time the memory gets fragmented by non-movable pages, so the chances to find a contiguous 1GB block are getting close to zero. Even dropping caches manually doesn't help a lot. At large scale rebooting servers in order to allocate gigantic hugepages is quite expensive and complex. At the same time keeping some constant percentage of memory in reserved hugepages even if the workload isn't using it is a big waste: not all workloads can benefit from using 1 GB pages. The following solution can solve the problem: 1) On boot time a dedicated cma area* is reserved. The size is passed as a kernel argument. 2) Run-time allocations of gigantic hugepages are performed using the cma allocator and the dedicated cma area In this case gigantic hugepages can be allocated successfully with a high probability, however the memory isn't completely wasted if nobody is using 1GB hugepages: it can be used for pagecache, anon memory, THPs, etc. * On a multi-node machine a per-node cma area is allocated on each node. Following gigantic hugetlb allocation are using the first available numa node if the mask isn't specified by a user. Usage: 1) configure the kernel to allocate a cma area for hugetlb allocations: pass hugetlb_cma=10G as a kernel argument 2) allocate hugetlb pages as usual, e.g. echo 10 > /sys/kernel/mm/hugepages/hugepages-1048576kB/nr_hugepages If the option isn't enabled or the allocation of the cma area failed, the current behavior of the system is preserved. x86 and arm-64 are covered by this patch, other architectures can be trivially added later. The patch contains clean-ups and fixes proposed and implemented by Aslan Bakirov and Randy Dunlap. It also contains ideas and suggestions proposed by Rik van Riel, Michal Hocko and Mike Kravetz. Thanks! Signed-off-by: Roman Gushchin <guro@fb.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Tested-by: Andreas Schaufler <andreas.schaufler@gmx.de> Acked-by: Mike Kravetz <mike.kravetz@oracle.com> Acked-by: Michal Hocko <mhocko@kernel.org> Cc: Aslan Bakirov <aslan@fb.com> Cc: Randy Dunlap <rdunlap@infradead.org> Cc: Rik van Riel <riel@surriel.com> Cc: Joonsoo Kim <js1304@gmail.com> Link: http://lkml.kernel.org/r/20200407163840.92263-3-guro@fb.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-04-10Merge tag 'pwm/for-5.7-rc1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm Pull pwm updates from Thierry Reding: "There's quite a few changes this time around. Most of these are fixes and cleanups, but there's also new chip support for some drivers and a bit of rework" * tag 'pwm/for-5.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm: (33 commits) pwm: pca9685: Fix PWM/GPIO inter-operation pwm: Make pwm_apply_state_debug() static pwm: meson: Remove redundant assignment to variable fin_freq pwm: jz4740: Allow selection of PWM channels 0 and 1 pwm: jz4740: Obtain regmap from parent node pwm: jz4740: Improve algorithm of clock calculation pwm: jz4740: Use clocks from TCU driver pwm: sun4i: Remove redundant needs_delay pwm: omap-dmtimer: Implement .apply callback pwm: omap-dmtimer: Do not disable PWM before changing period/duty_cycle pwm: omap-dmtimer: Fix PWM enabling sequence pwm: omap-dmtimer: Update description for PWM OMAP DM timer pwm: omap-dmtimer: Drop unused header file pwm: renesas-tpu: Drop confusing registered message pwm: renesas-tpu: Fix late Runtime PM enablement pwm: rcar: Fix late Runtime PM enablement dt-bindings: pwm: renesas-tpu: Document more R-Car Gen2 support pwm: meson: Fix confusing indentation pwm: pca9685: Use gpio core provided macro GPIO_LINE_DIRECTION_OUT pwm: pca9685: Replace CONFIG_PM with __maybe_unused ...
2020-04-10Merge tag 'for-linus-5.7-1' of git://github.com/cminyard/linux-ipmiLinus Torvalds
Pull IPMI updates from Corey Minyard: "Bug fixes for main IPMI driver, kcs updates A couple of bug fixes for the main IPMI driver, one functional and two annotations. The kcs driver has some significant updates that have been pending for a while, but I forgot to include in next until a week ago. But this code is only used by the people who are sending it to me, really, so it's not a big deal. I did want it to sit in next for at least a week, and it did result in a fix" * tag 'for-linus-5.7-1' of git://github.com/cminyard/linux-ipmi: ipmi: kcs: Fix aspeed_kcs_probe_of_v1() ipmi: Add missing annotation for ipmi_ssif_lock_cond() and ipmi_ssif_unlock_cond() ipmi: kcs: aspeed: Implement v2 bindings ipmi: kcs: Finish configuring ASPEED KCS device before enable dt-bindings: ipmi: aspeed: Introduce a v2 binding for KCS ipmi: fix hung processes in __get_guid() drivers: char: ipmi: ipmi_msghandler: Pass lockdep expression to RCU lists
2020-04-10Merge tag 'sound-fix-5.7-rc1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound Pull sound fixes from Takashi Iwai: "A collection of small fixes gathered since the previous update. ALSA core: - Regression fix for OSS PCM emulation ASoC: - Trivial fixes in reg bit mask ops, DAPM, DPCM and topology - Lots of fixes for Intel-based devices - Minor fixes for AMD, STM32, Qualcomm, Realtek Others: - Fixes for the bugs in mixer handling in HD-audio and ice1724 drivers that were caught by the recent kctl validator - New quirks for HD-audio and USB-audio Also this contains a fix for EDD firmware fix, which slipped from anyone's hands" * tag 'sound-fix-5.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: (35 commits) ALSA: hda: Add driver blacklist ALSA: usb-audio: Add mixer workaround for TRX40 and co ALSA: hda/realtek - Add quirk for MSI GL63 ALSA: ice1724: Fix invalid access for enumerated ctl items ALSA: hda: Fix potential access overflow in beep helper ASoC: cs4270: pull reset GPIO low then high ALSA: hda/realtek - Add HP new mute led supported for ALC236 ALSA: hda/realtek - Add supported new mute Led for HP ASoC: rt5645: Add platform-data for Medion E1239T ASoC: Intel: bytcr_rt5640: Add quirk for MPMAN MPWIN895CL tablet ASoC: stm32: sai: Add missing cleanup ALSA: usb-audio: Add registration quirk for Kingston HyperX Cloud Alpha S ASoC: Intel: atom: Fix uninitialized variable compiler warning ASoC: Intel: atom: Check drv->lock is locked in sst_fill_and_send_cmd_unlocked ASoC: Intel: atom: Take the drv->lock mutex before calling sst_send_slot_map() ASoC: SOF: Turn "firmware boot complete" message into a dbg message ALSA: usb-audio: Add Pioneer DJ DJM-250MK2 quirk ALSA: pcm: oss: Fix regression by buffer overflow fix (again) ALSA: pcm: oss: Fix regression by buffer overflow fix edd: Use scnprintf() for avoiding potential buffer overflow ...
2020-04-11arch: nios2: remove 'resetvalue' propertyAlexandru Ardelean
The 'altr,pio-1.0' driver does not handle the 'resetvalue', so remove it. Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com> Signed-off-by: Ley Foon Tan <ley.foon.tan@intel.com>
2020-04-11arch: nios2: rename 'altr,gpio-bank-width' -> 'altr,ngpio'Alexandru Ardelean
There is no more 'altr,gpio-bank-width' in the 'altr,pio-1.0' driver. There is a 'altr,ngpio' which is what the property wants to configure. This change updates all occurrences of 'altr,gpio-bank-width' to 'altr,ngpio'. Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com> Signed-off-by: Ley Foon Tan <ley.foon.tan@intel.com>
2020-04-10Merge tag 'acpi-5.7-rc1-3' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm Pull more ACPI updates from Rafael Wysocki: "These prevent a false-positive static checker warning from triggering in the ACPI EC driver (Rafael Wysocki), fix white space in an ACPI document (Vilhelm Prytz) and add static annotation to one variable (Jason Yan)" * tag 'acpi-5.7-rc1-3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: ACPI, x86/boot: make acpi_nobgrt static Documentation: firmware-guide: ACPI: fix table alignment in namespace.rst ACPI: EC: Fix up fast path check in acpi_ec_add()
2020-04-10Documentation: android: binderfs: add 'stats' mount optionRandy Dunlap
Add documentation of the binderfs 'stats' mount option. Description taken from the commit message. Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Acked-by: Christian Brauner <christian.brauner@ubuntu.com> Link: https://lore.kernel.org/r/baa0aa81-007d-af46-16a5-91fead0bd1b9@infradead.org Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2020-04-08Merge tag '9p-for-5.7-2' of git://github.com/martinetd/linuxLinus Torvalds
Pull 9p documentation update from Dominique Martinet: "Document the new O_NONBLOCK short read behavior" * tag '9p-for-5.7-2' of git://github.com/martinetd/linux: 9p: document short read behaviour with O_NONBLOCK
2020-04-08Merge tag 'ceph-for-5.7-rc1' of git://github.com/ceph/ceph-clientLinus Torvalds
Pull ceph updates from Ilya Dryomov: "The main items are: - support for asynchronous create and unlink (Jeff Layton). Creates and unlinks are satisfied locally, without waiting for a reply from the MDS, provided the client has been granted appropriate caps (new in v15.y.z ("Octopus") release). This can be a big help for metadata heavy workloads such as tar and rsync. Opt-in with the new nowsync mount option. - multiple blk-mq queues for rbd (Hannes Reinecke and myself). When the driver was converted to blk-mq, we settled on a single blk-mq queue because of a global lock in libceph and some other technical debt. These have since been addressed, so allocate a queue per CPU to enhance parallelism. - don't hold onto caps that aren't actually needed (Zheng Yan). This has been our long-standing behavior, but it causes issues with some active/standby applications (synchronous I/O, stalls if the standby goes down, etc). - .snap directory timestamps consistent with ceph-fuse (Luis Henriques)" * tag 'ceph-for-5.7-rc1' of git://github.com/ceph/ceph-client: (49 commits) ceph: fix snapshot directory timestamps ceph: wait for async creating inode before requesting new max size ceph: don't skip updating wanted caps when cap is stale ceph: request new max size only when there is auth cap ceph: cleanup return error of try_get_cap_refs() ceph: return ceph_mdsc_do_request() errors from __get_parent() ceph: check all mds' caps after page writeback ceph: update i_requested_max_size only when sending cap msg to auth mds ceph: simplify calling of ceph_get_fmode() ceph: remove delay check logic from ceph_check_caps() ceph: consider inode's last read/write when calculating wanted caps ceph: always renew caps if mds_wanted is insufficient ceph: update dentry lease for async create ceph: attempt to do async create when possible ceph: cache layout in parent dir on first sync create ceph: add new MDS req field to hold delegated inode number ceph: decode interval_sets for delegated inos ceph: make ceph_fill_inode non-static ceph: perform asynchronous unlink if we have sufficient caps ceph: don't take refs to want mask unless we have all bits ...
2020-04-08Merge tag 'ovl-update-5.7' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs Pull overlayfs update from Miklos Szeredi: - Fix failure to copy-up files from certain NFSv4 mounts - Sort out inconsistencies between st_ino and i_ino (used in /proc/locks) - Allow consistent (POSIX-y) inode numbering in more cases - Allow virtiofs to be used as upper layer - Miscellaneous cleanups and fixes * tag 'ovl-update-5.7' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs: ovl: document xino expected behavior ovl: enable xino automatically in more cases ovl: avoid possible inode number collisions with xino=on ovl: use a private non-persistent ino pool ovl: fix WARN_ON nlink drop to zero ovl: fix a typo in comment ovl: replace zero-length array with flexible-array member ovl: ovl_obtain_alias(): don't call d_instantiate_anon() for old ovl: strict upper fs requirements for remote upper fs ovl: check if upper fs supports RENAME_WHITEOUT ovl: allow remote upper ovl: decide if revalidate needed on a per-dentry basis ovl: separate detection of remote upper layer from stacked overlay ovl: restructure dentry revalidation ovl: ignore failure to copy up unknown xattrs ovl: document permission model ovl: simplify i_ino initialization ovl: factor out helper ovl_get_root() ovl: fix out of date comment and unreachable code ovl: fix value of i_ino for lower hardlink corner case
2020-04-08Merge tag 'linux-watchdog-5.7-rc1' of ↵Linus Torvalds
git://www.linux-watchdog.org/linux-watchdog Pull watchdog updates from Wim Van Sebroeck: - add TI K3 RTI watchdog - add stop_on_reboot parameter to control reboot policy - wm831x_wdt: Remove GPIO handling - several small fixes, improvements and clean-ups * tag 'linux-watchdog-5.7-rc1' of git://www.linux-watchdog.org/linux-watchdog: watchdog: Add K3 RTI watchdog support dt-bindings: watchdog: Add support for TI K3 RTI watchdog watchdog: ziirave_wdt: change name to be more specific watchdog: orion: use 0 for unset heartbeat watchdog: npcm: remove whitespaces watchdog: reset last_hw_keepalive time at start watchdog: imx2_wdt: Drop .remove callback watchdog: Add stop_on_reboot parameter to control reboot policy watchdog: wm831x_wdt: Remove GPIO handling watchdog: imx7ulp: Remove unused include of init.h watchdog: imx_sc_wdt: Remove unused includes watchdog: qcom: Use irq flags from firmware watchdog: pm8916_wdt: Add system sleep callbacks watchdog: qcom-wdt: disable pretimeout on timer platform
2020-04-09kbuild: support LLVM=1 to switch the default tools to Clang/LLVMMasahiro Yamada
As Documentation/kbuild/llvm.rst implies, building the kernel with a full set of LLVM tools gets very verbose and unwieldy. Provide a single switch LLVM=1 to use Clang and LLVM tools instead of GCC and Binutils. You can pass it from the command line or as an environment variable. Please note LLVM=1 does not turn on the integrated assembler. You need to pass LLVM_IAS=1 to use it. When the upstream kernel is ready for the integrated assembler, I think we can make it default. We discussed what we need, and we agreed to go with a simple boolean flag that switches both target and host tools: https://lkml.org/lkml/2020/3/28/494 https://lkml.org/lkml/2020/4/3/43 Some items discussed, but not adopted: - LLVM_DIR When multiple versions of LLVM are installed, I just thought supporting LLVM_DIR=/path/to/my/llvm/bin/ might be useful. CC = $(LLVM_DIR)clang LD = $(LLVM_DIR)ld.lld ... However, we can handle this by modifying PATH. So, we decided to not do this. - LLVM_SUFFIX Some distributions (e.g. Debian) package specific versions of LLVM with naming conventions that use the version as a suffix. CC = clang$(LLVM_SUFFIX) LD = ld.lld(LLVM_SUFFIX) ... will allow a user to pass LLVM_SUFFIX=-11 to use clang-11 etc., but the suffixed versions in /usr/bin/ are symlinks to binaries in /usr/lib/llvm-#/bin/, so this can also be handled by PATH. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Reviewed-by: Nathan Chancellor <natechancellor@gmail.com> Tested-by: Nathan Chancellor <natechancellor@gmail.com> # build Tested-by: Nick Desaulniers <ndesaulniers@google.com> Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
2020-04-09kbuild: replace AS=clang with LLVM_IAS=1Masahiro Yamada
The 'AS' variable is unused for building the kernel. Only the remaining usage is to turn on the integrated assembler. A boolean flag is a better fit for this purpose. AS=clang was added for experts. So, I replaced it with LLVM_IAS=1, breaking the backward compatibility. Suggested-by: Nick Desaulniers <ndesaulniers@google.com> Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Reviewed-by: Nathan Chancellor <natechancellor@gmail.com> Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
2020-04-08orangefs: clarify build steps for test server in orangefs.txtMike Marshall
Signed-off-by: Mike Marshall <hubcap@omnibond.com>
2020-04-08Merge tag 'asoc-fix-v5.7' of ↵Takashi Iwai
https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus ASoC: Fixes for v5.7 A collection of fixes that have been accumilated since the merge window, mainly relating to x86 platform support.
2020-04-09Documentation/llvm: fix the name of llvm-sizeFangrui Song
The tool is called llvm-size, not llvm-objsize. Fixes: fcf1b6a35c16 ("Documentation/llvm: add documentation on building w/ Clang/LLVM") Signed-off-by: Fangrui Song <maskray@google.com> Reviewed-by: Nick Desaulniers <ndesaulniers@google.com> Reviewed-by: Nathan Chancellor <natechancellor@gmail.com> Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2020-04-089p: document short read behaviour with O_NONBLOCKDominique Martinet
Regular files opened with O_NONBLOCK allow read to return after a single round-trip with the server instead of trying to fill buffer. Add a few lines in 9p documentation to describe that. Link: http://lkml.kernel.org/r/1586193572-1375-1-git-send-email-asmadeus@codewreck.org Signed-off-by: Dominique Martinet <dominique.martinet@cea.fr>
2020-04-09Documentation/changes: Raise minimum supported binutils version to 2.23Borislav Petkov
The currently minimum-supported binutils version 2.21 has the problem of promoting symbols which are defined outside of a section into absolute. According to Arvind: binutils-2.21 and -2.22. An x86-64 defconfig will fail with Invalid absolute R_X86_64_32S relocation: _etext and after fixing that one, with Invalid absolute R_X86_64_32S relocation: __end_of_kernel_reserve Those two versions of binutils have a bug when it comes to handling symbols defined outside of a section and binutils 2.23 has the proper fix, see: https://sourceware.org/legacy-ml/binutils/2012-06/msg00155.html Therefore, up to the fixed version directly, skipping the broken ones. Currently shipping distros already have the fixed binutils version so there should be no breakage resulting from this. For more details about the whole thing, see the thread in Link. Signed-off-by: Borislav Petkov <bp@suse.de> Link: https://lkml.kernel.org/r/20200110202349.1881840-1-nivedita@alum.mit.edu Acked-by: Kees Cook <keescook@chromium.org> Acked-by: Jason A. Donenfeld <Jason@zx2c4.com> Acked-by: Nick Desaulniers <ndesaulniers@google.com> Acked-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2020-04-08Documentation: firmware-guide: ACPI: fix table alignment in namespace.rstVilhelm Prytz
Fixe the alignment in the ACPI block diagram (RST table) by adding missing spaces Signed-off-by: Vilhelm Prytz <vilhelm@prytznet.se> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2020-04-07Merge tag 'drm-next-2020-04-08' of git://anongit.freedesktop.org/drm/drmLinus Torvalds
Pull drm fixes from Dave Airlie: "This is a set of fixes that have queued up, I think I might have another pull with some more before rc1 but I'd like to dequeue what I have now just in case Easter is more eggciting that expected. The main thing in here is a fix for a longstanding nouveau power management issues on certain laptops, it should help runtime suspend/resume for a lot of people. There is also a reverted patch for some drm_mm behaviour in atomic contexts. Summary: core: - revert drm_mm atomic patch - dt binding fixes fbcon: - null ptr error fix i915: - GVT fixes nouveau: - runpm fix - svm fixes amdgpu: - HDCP fixes - gfx10 fix - Misc display fixes - BACO fixes amdkfd: - Fix memory leak vboxvideo: - remove conflicting fbs vc4: - mode validation fix xen: - fix PTR_ERR usage" * tag 'drm-next-2020-04-08' of git://anongit.freedesktop.org/drm/drm: (41 commits) drm/nouveau/kms/nv50-: wait for FIFO space on PIO channels drm/nouveau/nvif: protect waits against GPU falling off the bus drm/nouveau/nvif: access PTIMER through usermode class, if available drm/nouveau/gr/gp107,gp108: implement workaround for HW hanging during init drm/nouveau: workaround runpm fail by disabling PCI power management on certain intel bridges drm/nouveau/svm: remove useless SVM range check drm/nouveau/svm: check for SVM initialized before migrating drm/nouveau/svm: fix vma range check for migration drm/nouveau: remove checks for return value of debugfs functions drm/nouveau/ttm: evict other IO mappings when running out of BAR1 space drm/amdkfd: kfree the wrong pointer drm/amd/display: increase HDCP authentication delay drm/amd/display: Correctly cancel future watchdog and callback events drm/amd/display: Don't try hdcp1.4 when content_type is set to type1 drm/amd/powerplay: move the ASIC specific nbio operation out of smu_v11_0.c drm/amd/powerplay: drop redundant BIF doorbell interrupt operations drm/amd/display: Fix dcn21 num_states drm/amd/display: Enable BT2020 in COLOR_ENCODING property drm/amd/display: LFC not working on 2.0x range monitors (v2) drm/amd/display: Support plane level CTM ...
2020-04-07Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input Pull input updates from Dmitry Torokhov: "An update to the Goodix touchscreen driver to enable it work properly on various Bay Trail and Cherry Trail devices, and a few other assorted changes" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: (26 commits) Input: update SPDX tag for input-event-codes.h Input: i8042 - add Acer Aspire 5738z to nomux list Input: goodix - fix compilation when ACPI support is disabled dt-bindings: touchscreen: Convert edt-ft5x06 to json-schema Input: of_touchscreen - explicitly choose axis Input: goodix - support gt9147 touchpanel dt-bindings: touchscreen: goodix: support of gt9147 Input: goodix - add support for Goodix GT917S Input: goodix - use string-based chip ID dt-bindings: input: touchscreen: add compatible string for Goodix GT917S Input: goodix - add support for more then one touch-key Input: goodix - fix spurious key release events Input: goodix - try to reset the controller if the i2c-test fails Input: goodix - restore config on resume if necessary Input: goodix - make goodix_send_cfg() take a raw buffer as argument Input: goodix - add minimum firmware size check Input: goodix - save a copy of the config from goodix_read_config() Input: goodix - move defines to above struct goodix_ts_data declaration Input: goodix - add support for controlling the IRQ pin through ACPI methods Input: goodix - add support for getting IRQ + reset GPIOs on Bay Trail devices ...
2020-04-07Merge tag 'thermal-v5.7-rc1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/thermal/linux Pull thermal updates from Daniel Lezcano: - Convert tsens configuration DT binding to yaml (Rajeshwari) - Add interrupt support on the rcar sensor (Niklas Söderlund) - Add a new Spreadtrum thermal driver (Baolin Wang) - Add thermal binding for the fsl scu board, a new API to retrieve the sensor id bound to the thermal zone and i.MX system controller sensor (Anson Huang)) - Remove warning log when a deferred probe is requested on Exynos (Marek Szyprowski) - Add the thermal monitoring unit support for imx8mm with its DT bindings (Anson Huang) - Rephrase the Kconfig text for clarity (Linus Walleij) - Use the gpio descriptor for the ti-soc-thermal (Linus Walleij) - Align msg structure to 4 bytes for i.MX SC, fix the Kconfig dependency, add the __may_be unused annotation for PM functions and the COMPILE_TEST option for imx8mm (Anson Huang) - Fix a dependency on regmap in Kconfig for qoriq (Yuantian Tang) - Add DT binding and support for the rcar gen3 r8a77961 and improve the error path on the rcar init function (Niklas Söderlund) - Cleanup and improvements for the tsens Qcom sensor (Amit Kucheria) - Improve code by removing lock and caching values in the rcar thermal sensor (Niklas Söderlund) - Cleanup in the qoriq drivers and add a call to imx_thermal_unregister_legacy_cooling in the removal function (Anson Huang) - Remove redundant 'maxItems' in tsens and sprd DT bindings (Rob Herring) - Change the thermal DT bindings by making the cooling-maps optional (Yuantian Tang) - Add Tiger Lake support (Sumeet Pawnikar) - Use scnprintf() for avoiding potential buffer overflow (Takashi Iwai) - Make pkg_temp_lock a raw_spinlock_t(Clark Williams) - Fix incorrect data types by changing them to signed on i.MX SC (Anson Huang) - Replace zero-length array with flexible-array member (Gustavo A. R. Silva) - Add support for i.MX8MP in the driver and in the DT bindings (Anson Huang) - Fix return value of the cpufreq_set_cur_state() function (Willy Wolff) - Remove abusing and scary WARN_ON in the cpufreq cooling device (Daniel Lezcano) - Fix build warning of incorrect argument type reported by sparse on imx8mm (Anson Huang) - Fix stub for the devfreq cooling device (Martin Blumenstingl) - Fix cpu idle cooling documentation (Sergey Vidishev) * tag 'thermal-v5.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thermal/linux: (52 commits) Documentation: cpu-idle-cooling: Fix diagram for 33% duty cycle thermal: devfreq_cooling: inline all stubs for CONFIG_DEVFREQ_THERMAL=n thermal: imx8mm: Fix build warning of incorrect argument type thermal/drivers/cpufreq_cooling: Remove abusing WARN_ON thermal/drivers/cpufreq_cooling: Fix return of cpufreq_set_cur_state thermal: imx8mm: Add i.MX8MP support dt-bindings: thermal: imx8mm-thermal: Add support for i.MX8MP thermal: qcom: tsens.h: Replace zero-length array with flexible-array member thermal: imx_sc_thermal: Fix incorrect data type thermal: int340x_thermal: Use scnprintf() for avoiding potential buffer overflow thermal: int340x: processor_thermal: Add Tiger Lake support thermal/x86_pkg_temp: Make pkg_temp_lock a raw_spinlock_t dt-bindings: thermal: make cooling-maps property optional dt-bindings: thermal: qcom-tsens: Remove redundant 'maxItems' dt-bindings: thermal: sprd: Remove redundant 'maxItems' thermal: imx: Calling imx_thermal_unregister_legacy_cooling() in .remove thermal: qoriq: Sort includes alphabetically thermal: qoriq: Use devm_add_action_or_reset() to handle all cleanups thermal: rcar_thermal: Remove lock in rcar_thermal_get_current_temp() thermal: rcar_thermal: Do not store ctemp in rcar_thermal_priv ...
2020-04-07Merge tag 'mfd-next-5.7' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd Pull mfd updates from Lee Jones: "New Drivers: - Add support for IQS620A/621/622/624/625 Azoteq IQS62X Sensors New Device Support: - Add support for ADC, IRQ, Regulator, RTC and WDT to Ricoh RN5T618 PMIC - Add support for Comet Lake to Intel LPSS New Functionality: - Add support for Charger Detection to Spreadtrum SC27xx PMICs - Add support for Interrupt Polarity to Dialog Semi DA9062/61 PMIC - Add ACPI enumeration support to Diolan DLN2 USB Adaptor Fix-ups: - Device Tree; iqs62x, rn5t618, cros_ec_dev, stm32-lptimer, rohm,bd71837, rohm,bd71847 - I2C registration; rn5t618 - Kconfig; MFD_CPCAP, AB8500_CORE, MFD_WM8994, MFD_WM97xx, MFD_STPMIC1 - Use flexible-array members; omap-usb-tll, qcom-pm8xxx - Remove unnecessary casts; omap-usb-host, omap-usb-tll - Power (suspend/resume/poweroff) enhancements; rk808 - Improve error/sanity checking; dln2 - Use snprintf(); aat2870-core Bug Fixes: - Fix PCI IDs in intel-lpss-pci" * tag 'mfd-next-5.7' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd: (33 commits) mfd: intel-lpss: Fix Intel Elkhart Lake LPSS I2C input clock mfd: aat2870: Use scnprintf() for avoiding potential buffer overflow mfd: dln2: Allow to be enumerated via ACPI mfd: da9062: Add support for interrupt polarity defined in device tree dt-bindings: bd718x7: Yamlify and add BD71850 mfd: dln2: Fix sanity checking for endpoints mfd: intel-lpss: Add Intel Comet Lake PCH-V PCI IDs mfd: sc27xx: Add USB charger type detection support dt-bindings: mfd: Document STM32 low power timer bindings mfd: rk808: Convert RK805 to shutdown/suspend hooks mfd: rk808: Reduce shutdown duplication mfd: rk808: Stop using syscore ops mfd: rk808: Ensure suspend/resume hooks always work mfd: rk808: Always use poweroff when requested mfd: omap: Remove useless cast for driver.name mfd: Kconfig: Fix some misspelling of the word functionality mfd: pm8xxx: Replace zero-length array with flexible-array member mfd: omap-usb-tll: Replace zero-length array with flexible-array member mfd: cpcap: Fix compile if MFD_CORE is not selected mfd: cros_ec: Check DT node for usbpd-notify add ...
2020-04-08Merge tag 'drm-misc-next-fixes-2020-04-04' of ↵Dave Airlie
git://anongit.freedesktop.org/drm/drm-misc into drm-next A bunch of fixes to avoid null pointer dereference in fbcon, fix a return in xen, some DT bindings fixes, a vc4 issue with 1920x1200 mode validation, and a conflicting framebuffer in vboxvideo. Signed-off-by: Dave Airlie <airlied@redhat.com> From: Maxime Ripard <maxime@cerno.tech> Link: https://patchwork.freedesktop.org/patch/msgid/20200404090057.a3m7uw6tavwtcyon@gilmour.lan
2020-04-07Merge branch 'akpm' (patches from Andrew)Linus Torvalds
Merge more updates from Andrew Morton: - a lot more of MM, quite a bit more yet to come: (memcg, pagemap, vmalloc, pagealloc, migration, thp, ksm, madvise, virtio, userfaultfd, memory-hotplug, shmem, rmap, zswap, zsmalloc, cleanups) - various other subsystems (procfs, misc, MAINTAINERS, bitops, lib, checkpatch, epoll, binfmt, kallsyms, reiserfs, kmod, gcov, kconfig, ubsan, fault-injection, ipc) * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (158 commits) ipc/shm.c: make compat_ksys_shmctl() static ipc/mqueue.c: fix a brace coding style issue lib/Kconfig.debug: fix a typo "capabilitiy" -> "capability" ubsan: include bug type in report header kasan: unset panic_on_warn before calling panic() ubsan: check panic_on_warn drivers/misc/lkdtm/bugs.c: add arithmetic overflow and array bounds checks ubsan: split "bounds" checker from other options ubsan: add trap instrumentation option init/Kconfig: clean up ANON_INODES and old IO schedulers options kernel/gcov/fs.c: replace zero-length array with flexible-array member gcov: gcc_3_4: replace zero-length array with flexible-array member gcov: gcc_4_7: replace zero-length array with flexible-array member kernel/kmod.c: fix a typo "assuems" -> "assumes" reiserfs: clean up several indentation issues kallsyms: unexport kallsyms_lookup_name() and kallsyms_on_each_symbol() samples/hw_breakpoint: drop use of kallsyms_lookup_name() samples/hw_breakpoint: drop HW_BREAKPOINT_R when reporting writes fs/binfmt_elf.c: don't free interpreter's ELF pheaders on common path fs/binfmt_elf.c: allocate less for static executable ...
2020-04-07Merge tag 'f2fs-for-5.7-rc1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs Pull f2fs updates from Jaegeuk Kim: "In this round, we've mainly focused on fixing bugs and addressing issues in recently introduced compression support. Enhancement: - add zstd support, and set LZ4 by default - add ioctl() to show # of compressed blocks - show mount time in debugfs - replace rwsem with spinlock - avoid lock contention in DIO reads Some major bug fixes wrt compression: - compressed block count - memory access and leak - remove obsolete fields - flag controls Other bug fixes and clean ups: - fix overflow when handling .flags in inode_info - fix SPO issue during resize FS flow - fix compression with fsverity enabled - potential deadlock when writing compressed pages - show missing mount options" * tag 'f2fs-for-5.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs: (66 commits) f2fs: keep inline_data when compression conversion f2fs: fix to disable compression on directory f2fs: add missing CONFIG_F2FS_FS_COMPRESSION f2fs: switch discard_policy.timeout to bool type f2fs: fix to verify tpage before releasing in f2fs_free_dic() f2fs: show compression in statx f2fs: clean up dic->tpages assignment f2fs: compress: support zstd compress algorithm f2fs: compress: add .{init,destroy}_decompress_ctx callback f2fs: compress: fix to call missing destroy_compress_ctx() f2fs: change default compression algorithm f2fs: clean up {cic,dic}.ref handling f2fs: fix to use f2fs_readpage_limit() in f2fs_read_multi_pages() f2fs: xattr.h: Make stub helpers inline f2fs: fix to avoid double unlock f2fs: fix potential .flags overflow on 32bit architecture f2fs: fix NULL pointer dereference in f2fs_verity_work() f2fs: fix to clear PG_error if fsverity failed f2fs: don't call fscrypt_get_encryption_info() explicitly in f2fs_tmpfile() f2fs: don't trigger data flush in foreground operation ...
2020-04-07Documentation: driver-api/usb/writing_usb_driver.rst Updates documentation linksJoakim Lönnegren
In writing_usb_driver.rst: Remove link to https://www.qbik.ch/usb/devices/ since it seems to be inactive since 2013 Update link to linux-usb mailing list archive Signed-off-by: Joakim Lönnegren <joakimlonnegren@gmail.com> Link: https://lore.kernel.org/r/20200312201354.285839-1-joakimlonnegren@gmail.om Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2020-04-07docs: driver-api: address duplicate label warningLukas Bulwahn
Delete identically named subsection to fix Documentation warning: Documentation/driver-api/w1.rst:11: \ WARNING: duplicate label driver-api/w1:w1 api internal to the kernel, \ other instance in Documentation/driver-api/w1.rst Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com> Link: https://lore.kernel.org/r/20200330060132.7773-1-lukas.bulwahn@gmail.com Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2020-04-07Merge tag 'for-linus' of git://github.com/openrisc/linuxLinus Torvalds
Pull OpenRISC updates from Stafford Horne: "A few cleanups all over the place, things of note: - Enable the clone3 syscall - Remove CONFIG_CROSS_COMPILE from Krzysztof Kozlowski - Update to use mmgrab from Julia Lawall" * tag 'for-linus' of git://github.com/openrisc/linux: openrisc: Remove obsolete show_trace_task function openrisc: Cleanup copy_thread_tls docs and comments openrisc: Enable the clone3 syscall openrisc: Convert copy_thread to copy_thread_tls openrisc: use mmgrab openrisc: configs: Cleanup CONFIG_CROSS_COMPILE
2020-04-07Documentation: sysrq: fix RST formattingAlyssa Ross
"On x86" and "On SPARC" are now definition list terms, like "On PowerPC", "On other", and "On all". The Credits list is now a bulleted list, like lots of Credits lists in other files. This prevents the list from becoming a single long, unpunctuated sentence in the generated documentation. I also did a couple of other tiny readability improvements to the "How do I use the magic SysRq key?" section while I was there. Signed-off-by: Alyssa Ross <hi@alyssa.is> Link: https://lore.kernel.org/r/20200403170701.10852-1-hi@alyssa.is Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2020-04-07docs: kernel-parameters.txt: Fix broken referencesJimmy Assarsson
Fix remaining broken references in kernel-parameters.txt. Cc: Jonathan Corbet <corbet@lwn.net> Signed-off-by: Jimmy Assarsson <jimmyassarsson@gmail.com> Link: https://lore.kernel.org/r/20200402172614.3020-2-jimmyassarsson@gmail.com Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2020-04-07docs: kernel-parameters.txt: Remove nompxJimmy Assarsson
x86/mpx was removed in commit 45fc24e89b7c ("x86/mpx: remove MPX from arch/x86"), this removes the documentation of parameter nompx. Fixes: 45fc24e89b7c ("x86/mpx: remove MPX from arch/x86") Signed-off-by: Jimmy Assarsson <jimmyassarsson@gmail.com> Acked-by: Dave Hansen <dave.hansen@linux.intel.com> Link: https://lore.kernel.org/r/20200402172614.3020-1-jimmyassarsson@gmail.com Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2020-04-07docs: filesystems: fix typo in qnx6.rstVilhelm Prytz
- 'structer' replaced with 'structure' Signed-off-by: Vilhelm Prytz <vilhelm@prytznet.se> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2020-04-07Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netLinus Torvalds
Pull networking fixes from David Miller: 1) Slave bond and team devices should not be assigned ipv6 link local addresses, from Jarod Wilson. 2) Fix clock sink config on some at803x PHY devices, from Oleksij Rempel. 3) Uninitialized stack space transmitted in slcan frames, fix from Richard Palethorpe. 4) Guard HW VLAN ops properly in stmmac driver, from Jose Abreu. 5) "=" --> "|=" fix in aquantia driver, from Colin Ian King. 6) Fix TCP fallback in mptcp, from Florian Westphal. (accessing a plain tcp_sk as if it were an mptcp socket). 7) Fix cavium driver in some configurations wrt. PTP, from Yue Haibing. 8) Make ipv6 and ipv4 consistent in the lower bound allowed for neighbour entry retrans_time, from Hangbin Liu. 9) Don't use private workqueue in pegasus usb driver, from Petko Manolov. 10) Fix integer overflow in mlxsw, from Colin Ian King. 11) Missing refcnt init in cls_tcindex, from Cong Wang. 12) One too many loop iterations when processing cmpri entries in ipv6 rpl code, from Alexander Aring. 13) Disable SG and TSO by default in r8169, from Heiner Kallweit. 14) NULL deref in macsec, from Davide Caratti. * git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (42 commits) macsec: fix NULL dereference in macsec_upd_offload() skbuff.h: Improve the checksum related comments net: dsa: bcm_sf2: Ensure correct sub-node is parsed qed: remove redundant assignment to variable 'rc' wimax: remove some redundant assignments to variable result mlxsw: spectrum_flower: Do not stop at FLOW_ACTION_VLAN_MANGLE mlxsw: spectrum_flower: Do not stop at FLOW_ACTION_PRIORITY r8169: change back SG and TSO to be disabled by default net: dsa: bcm_sf2: Do not register slave MDIO bus with OF ipv6: rpl: fix loop iteration tun: Don't put_page() for all negative return values from XDP program net: dsa: mt7530: fix null pointer dereferencing in port5 setup mptcp: add some missing pr_fmt defines net: phy: micrel: kszphy_resume(): add delay after genphy_resume() before accessing PHY registers net_sched: fix a missing refcnt in tcindex_init() net: stmmac: dwmac1000: fix out-of-bounds mac address reg setting mlxsw: spectrum_trap: fix unintention integer overflow on left shift pegasus: Remove pegasus' own workqueue neigh: support smaller retrans_time settting net: openvswitch: use hlist_for_each_entry_rcu instead of hlist_for_each_entry ...
2020-04-07mm/zswap: allow setting default status, compressor and allocator in KconfigMaciej S. Szmigiero
The compressed cache for swap pages (zswap) currently needs from 1 to 3 extra kernel command line parameters in order to make it work: it has to be enabled by adding a "zswap.enabled=1" command line parameter and if one wants a different compressor or pool allocator than the default lzo / zbud combination then these choices also need to be specified on the kernel command line in additional parameters. Using a different compressor and allocator for zswap is actually pretty common as guides often recommend using the lz4 / z3fold pair instead of the default one. In such case it is also necessary to remember to enable the appropriate compression algorithm and pool allocator in the kernel config manually. Let's avoid the need for adding these kernel command line parameters and automatically pull in the dependencies for the selected compressor algorithm and pool allocator by adding an appropriate default switches to Kconfig. The default values for these options match what the code was using previously as its defaults. Signed-off-by: Maciej S. Szmigiero <mail@maciej.szmigiero.name> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: Vitaly Wool <vitaly.wool@konsulko.com> Link: http://lkml.kernel.org/r/20200202000112.456103-1-mail@maciej.szmigiero.name Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-04-07mm/memory_hotplug.c: only respect mem= parameter during boot stageBaoquan He
In commit 357b4da50a62 ("x86: respect memory size limiting via mem= parameter") a global varialbe max_mem_size is added to store the value parsed from 'mem= ', then checked when memory region is added. This truly stops those DIMMs from being added into system memory during boot-time. However, it also limits the later memory hotplug functionality. Any DIMM can't be hotplugged any more if its region is beyond the max_mem_size. We will get errors like: [ 216.387164] acpi PNP0C80:02: add_memory failed [ 216.389301] acpi PNP0C80:02: acpi_memory_enable_device() error [ 216.392187] acpi PNP0C80:02: Enumeration failure This will cause issue in a known use case where 'mem=' is added to the hypervisor. The memory that lies after 'mem=' boundary will be assigned to KVM guests. After commit 357b4da50a62 merged, memory can't be extended dynamically if system memory on hypervisor is not sufficient. So fix it by also checking if it's during boot-time restricting to add memory. Otherwise, skip the restriction. And also add this use case to document of 'mem=' kernel parameter. Fixes: 357b4da50a62 ("x86: respect memory size limiting via mem= parameter") Signed-off-by: Baoquan He <bhe@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: Juergen Gross <jgross@suse.com> Acked-by: Michal Hocko <mhocko@suse.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: William Kucharski <william.kucharski@oracle.com> Cc: David Hildenbrand <david@redhat.com> Cc: Balbir Singh <bsingharora@gmail.com> Link: http://lkml.kernel.org/r/20200204050643.20925-1-bhe@redhat.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-04-07userfaultfd: wp: UFFDIO_REGISTER_MODE_WP documentation updateMartin Cracauer
Add documentation about the write protection support. [peterx@redhat.com: rewrite in rst format; fixups here and there] Signed-off-by: Martin Cracauer <cracauer@cons.org> Signed-off-by: Andrea Arcangeli <aarcange@redhat.com> Signed-off-by: Peter Xu <peterx@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: Jerome Glisse <jglisse@redhat.com> Reviewed-by: Mike Rapoport <rppt@linux.vnet.ibm.com> Cc: Bobby Powers <bobbypowers@gmail.com> Cc: Brian Geffon <bgeffon@google.com> Cc: David Hildenbrand <david@redhat.com> Cc: Denis Plotnikov <dplotnikov@virtuozzo.com> Cc: "Dr . David Alan Gilbert" <dgilbert@redhat.com> Cc: Hugh Dickins <hughd@google.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: "Kirill A . Shutemov" <kirill@shutemov.name> Cc: Marty McFadden <mcfadden8@llnl.gov> Cc: Maya Gokhale <gokhale2@llnl.gov> Cc: Mel Gorman <mgorman@suse.de> Cc: Mike Kravetz <mike.kravetz@oracle.com> Cc: Pavel Emelyanov <xemul@openvz.org> Cc: Rik van Riel <riel@redhat.com> Cc: Shaohua Li <shli@fb.com> Link: http://lkml.kernel.org/r/20200220163112.11409-17-peterx@redhat.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-04-07mm/page_reporting: add free page reporting documentationAlexander Duyck
Add documentation for free page reporting. Currently the only consumer is virtio-balloon, however it is possible that other drivers might make use of this so it is best to add a bit of documetation explaining at a high level how to use the API. Signed-off-by: Alexander Duyck <alexander.h.duyck@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Dave Hansen <dave.hansen@intel.com> Cc: David Hildenbrand <david@redhat.com> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Luiz Capitulino <lcapitulino@redhat.com> Cc: Matthew Wilcox <willy@infradead.org> Cc: Mel Gorman <mgorman@techsingularity.net> Cc: Michael S. Tsirkin <mst@redhat.com> Cc: Michal Hocko <mhocko@kernel.org> Cc: Nitesh Narayan Lal <nitesh@redhat.com> Cc: Oscar Salvador <osalvador@suse.de> Cc: Pankaj Gupta <pagupta@redhat.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Rik van Riel <riel@surriel.com> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Wei Wang <wei.w.wang@intel.com> Cc: Yang Zhang <yang.zhang.wz@gmail.com> Cc: wei qi <weiqi4@huawei.com> Link: http://lkml.kernel.org/r/20200211224730.29318.43815.stgit@localhost.localdomain Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-04-07mm, thp: track fallbacks due to failed memcg charges separatelyDavid Rientjes
The thp_fault_fallback and thp_file_fallback vmstats are incremented if either the hugepage allocation fails through the page allocator or the hugepage charge fails through mem cgroup. This patch leaves this field untouched but adds two new fields, thp_{fault,file}_fallback_charge, which is incremented only when the mem cgroup charge fails. This distinguishes between attempted hugepage allocations that fail due to fragmentation (or low memory conditions) and those that fail due to mem cgroup limits. That can be used to determine the impact of fragmentation on the system by excluding faults that failed due to memcg usage. Signed-off-by: David Rientjes <rientjes@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: Yang Shi <yang.shi@linux.alibaba.com> Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Mike Rapoport <rppt@linux.ibm.com> Cc: Jeremy Cline <jcline@redhat.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Mike Kravetz <mike.kravetz@oracle.com> Cc: Michal Hocko <mhocko@kernel.org> Cc: Vlastimil Babka <vbabka@suse.cz> Link: http://lkml.kernel.org/r/alpine.DEB.2.21.2003061422070.7412@chino.kir.corp.google.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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